Update NetworkStateNotifier to use message_center.

ash/system/chromeos/network/tray_network.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_SYSTEM_CHROMEOS_NETWORK_TRAY_NETWORK_H
 #define ASH_SYSTEM_CHROMEOS_NETWORK_TRAY_NETWORK_H
 
 #include <set>
 
 #include "ash/system/chromeos/network/network_icon.h"
 #include "ash/system/chromeos/network/network_observer.h"
 #include "ash/system/chromeos/network/tray_network_state_observer.h"
 #include "ash/system/tray/system_tray_item.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 
 namespace chromeos {
 class NetworkState;
 }
 
 namespace ash {
 namespace internal {
 
 namespace tray {
 class NetworkDefaultView;
 class NetworkDetailedView;
-class NetworkMessages;
-class NetworkMessageView;
-class NetworkNotificationView;
 class NetworkTrayView;
 }
 
 class TrayNetwork : public SystemTrayItem,
                     public NetworkObserver,
                     public TrayNetworkStateObserver::Delegate {
  public:
   explicit TrayNetwork(SystemTray* system_tray);
   virtual ~TrayNetwork();
 
   tray::NetworkDetailedView* detailed() { return detailed_; }
 
   // SystemTrayItem
   virtual views::View* CreateTrayView(user::LoginStatus status) OVERRIDE;
   virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE;
   virtual views::View* CreateDetailedView(user::LoginStatus status) OVERRIDE;
-  virtual views::View* CreateNotificationView(
-      user::LoginStatus status) OVERRIDE;
   virtual void DestroyTrayView() OVERRIDE;
   virtual void DestroyDefaultView() OVERRIDE;
   virtual void DestroyDetailedView() OVERRIDE;
-  virtual void DestroyNotificationView() OVERRIDE;
   virtual void UpdateAfterLoginStatusChange(user::LoginStatus status) OVERRIDE;
   virtual void UpdateAfterShelfAlignmentChange(
       ShelfAlignment alignment) OVERRIDE;
 
   // NetworkObserver
-  virtual void SetNetworkMessage(
-      NetworkTrayDelegate* delegate,
-      MessageType message_type,
-      NetworkType network_type,
-      const base::string16& title,
-      const base::string16& message,
-      const std::vector<base::string16>& links) OVERRIDE;
-  virtual void ClearNetworkMessage(MessageType message_type) OVERRIDE;
   virtual void RequestToggleWifi() OVERRIDE;
 
   // TrayNetworkStateObserver::Delegate
   virtual void NetworkStateChanged(bool list_changed) OVERRIDE;
   virtual void NetworkServiceChanged(
       const chromeos::NetworkState* network) OVERRIDE;
 
  private:
-  friend class tray::NetworkMessageView;
-  friend class tray::NetworkNotificationView;
-
-  void LinkClicked(MessageType message_type, int link_id);
-
-  const tray::NetworkMessages* messages() const { return messages_.get(); }
-
   tray::NetworkTrayView* tray_;
   tray::NetworkDefaultView* default_;
   tray::NetworkDetailedView* detailed_;
-  tray::NetworkNotificationView* notification_;
-  scoped_ptr<tray::NetworkMessages> messages_;
   bool request_wifi_view_;
   scoped_ptr<TrayNetworkStateObserver> network_state_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayNetwork);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_CHROMEOS_NETWORK_TRAY_NETWORK_H